WebMO Home Page
   Pro Features
   Enterprise Features
   Compare Features
   System Requirements
   Screen Shots
   Working Demo
   Support & Tutorials
   Support Forum
   Revision History
   Mailing List
   Educational Resources
   License Info
   Buy WebMO Pro/Ent
   Obtain Free License
WebMO - Computational chemistry on the WWW
Recent news

WebMO 19.0 is now available for free download!

WebMO 19.0 Pro and Enterprise have a variety of additional features and is available for purchase.

The WebMO app is now available for iOS and Android.

March 31, 2020
WebMO Demo Server

The WebMO Demo Server is now up and running! Log in as follows:

      Username: guest
      Password: guest

Job Time Limit: Because the WebMO Demo Server is a shared resource, jobs are limited to one minute (60 seconds) of CPU time!


The following instructions will build the formaldehyde molecule, optimize its geometry, and display the results:

  1. Log in to the WebMO Demo Server as Username="guest" and Password="guest" (no quotes)
  2. In the WebMO Job Manager page, click "New Job"
  3. In the Build Molecule page, in the WebMO Editor applet:
    • Note the status line ("Build Mode - C ..."); click in the middle of the applet to insert a carbon atom
    • In the menu, choose Build: O to make oxygen active; note the status line
    • Click on the C atom, drag, and let up the mouse button to insert a bond to an oxygen atom
    • Drag between C and O again to change the single bond to a double bond
    • In the menu, choose Clean-Up: Comprehensive; note that hydrogens are added, bond lengths are idealized, and bond angles are idealized (WebMO knows organic chemistry!)
  4. In the bottom right corner of the Build Molecule page, click the Continue arrow
  5. In the Choose Computational Engine page, click Mopac, and then click the Continue arrow
  6. In the Configure Mopac Job Options page:
    • Select Calculation: Geometry Optimization
    • Click the Continue arrow to submit your job; note that your job appears in the WebMO Job Manager page
  7. In the WebMO Job Manager page, click "Refresh" to update the page; note that the job Status is Complete
  8. Click the job title "CH2O" to arrive at the View Results page; scroll down to look at your Calculated Quantities; in particular:
    • Note the computed Symmetry (C2V), Heat of Formation (-34.08 kcal/mol), and Dipole Moment (2.16 Debye)
    • Note the computed C=O bond order (1.98) and C-H bond order (0.93)
    • Click the Partial Charge View icon (magnifying glass)
    • In the WebMO Viewer applet, click O, shift-click C, and shift-click H; look at the status line to view the computed O-C-H bond angle
    • To the left of the WebMO Viewer applet, click the Raw Output link to see what Mopac actually calculated

Copyright © 2009, WebMO, LLC, all rights reserved.